Cook spaghetti according to package directions; drain. In a large bowl, beat the egg, milk and salt. Add spaghetti; toss to coat. Transfer to a greased 13-in. x 9-in. x 2-in. baking dish.

In a large skillet, cook the beef, sausage, onion and green pepper over medium heat until meat is no longer pink; drain. Add spaghetti sauce and tomato sauce; mix well. Spoon over the spaghetti mixture.

Bake, uncovered, at 350° for 20 minutes. Sprinkle with the cheese. Bake 10 minutes longer or until cheese is melted. Let stand for 10 minutes before cutting. Makes 6-8 servings.